LAX04CA309

NTSB accident investigation · Cessna 172S · Willits, CA · September 2, 2004

Accident · Minor injuriesData collectionFinal report
Date
September 1, 2004, 21:00 local (Sep 2, 2004, 04:00 UTC)
Place
Willits, CA
Injuries
1 minor
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N897TWCessna 172S
Weather
Visual (VMC) · Night/dark
Status
Completed · report December 3, 2004
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20040901022059A
Case key
60089

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

the pilot's inadvertent descent and controlled flight into obstacles while maneuvering to land. Contributing factors were the dark, nighttime condition, which impaired the pilot's visual perceptions, and the pilot's failure to obtain a pertinent Notice to Airman regarding inoperative runway lights.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectManeuvering
Object - tree(s)
Airport facilities,in-runway lights - not operatingFactor
Notams - not obtainedPilot in commandFactor
Light condition - dark nightFactor
Visual/aural perceptionPilot in commandFactor
Altitude - not maintainedPilot in commandCause

Analysis

While maneuvering to locate the runway during a dark, nighttime flight, the airplane descended until colliding with trees. As the pilot approached his home base airport, he attempted to activate the pilot controlled runway lights. However, he was unsuccessful. Thereafter, the pilot performed a low altitude pass over what he believed was runway 16/34 to ascertain if a portion of the runway's lights were operating. During the maneuver, the pilot failed to detect that the airplane was not aligned with the runway. Also, the pilot failed to maintain adequate altitude to avoid colliding with trees 1/8-mile west of the airport. Neither prior to taking off, nor at any time during the accident flight, did the pilot become aware that a Notice to Airman had been issued indicating that the airport's runway lights were "out of service."

Factual narrative

On September 1, 2004, about 2100 Pacific daylight time, a Cessna 172S, N897TW, operated by the airplane's pilot-owner, descended into trees about 1/8-mile west of the Willits Municipal Airport, Willits, California. The airplane was destroyed, and the private pilot received minor injuries. Visual meteorological conditions prevailed for the dark, nighttime personal flight, and no flight plan had been filed. The pilot was operating the airplane under the provisions of 14 CFR Part 91, and the flight originated from Watsonville, California, at 1936.

The pilot reported to the National Transportation Safety Board investigator that he experienced no mechanical malfunctions during the flight. The airplane's landing light was functional, although he did not use it.

According to the pilot, seconds prior to the crash he was attempting to locate his home base airport. The pilot reported to the Safety Board investigator and to an officer from the Mendocino County Sheriff's department that, upon arriving in the vicinity of the airport, he keyed the airplane's radio transmitter to activate the airport's runway lights. The pilot reported that he made two such attempts, and both were unsuccessful. Thereafter, he maneuvered toward what he believed was the airport, with the intention of making a low pass over runway 16/34 to ascertain the possibility that the runway lights were partially operating.

The pilot additionally reported that while looking for the runway he initially intended to level out about 500 feet above the traffic pattern altitude. But evidently, the airplane continued descending until it collided with trees and terrain, west of the runway. The pilot also acknowledged to the Safety Board investigator that neither prior to taking off, nor at any time during the accident flight, did he become aware of the fact that the destination airport's runway lights were out of service.

According to the Federal Aviation Administration's Automated Flight Service Station in Oakland, California, in September 2004, NOTAM (Notice to Airman) number 08/104 was issued. The NOTAM was in effect on the accident date, and it stated: "Runway 16/34 runway lights out of service."

Aircraft

Registration
N897TW
Reported as
Cessna 172S
Category
Airplane
Serial number
172S8978
Engine
Lycoming IO-360-L2A, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Edward A. Warburton
Registered owner
Edward A. Warburton
Airworthiness certificate
Standard, Normal
Departed
WVI · Watsonville, CA
Destination
O28 · Willits, CA
Airport
O28 · Willits Municipal

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
68
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Flight hours
1,656 total · 183 in this make and model · 24 in the last 90 days · 7 in the last 30 days

Weather

Conditions
Visual (VMC) · Night/dark

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.